RT Journal Article SR Electronic T1 Radioactive iodine therapy as single modality treatment in tumor thrombus arising from follicular thyroid carcinoma JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP jnmt.120.247122 DO 10.2967/jnmt.120.247122 A1 Anwin Joseph Kavanal A1 Deepa Singh A1 Ashwani Sood A1 Sarath B Kumar A1 Swayamjeet Satapathy A1 Bhagwant Rai Mittal YR 2020 UL http://tech.snmjournals.org/content/early/2020/09/03/jnmt.120.247122.abstract AB Differentiated thyroid carcinoma rarely involves great veins with tumor thrombosis. Multimodality treatment with surgery, radioiodine therapy and targeted therapies are used for management of tumor thrombus associated with thyroid malignancies, though no established guidelines exist. Authors present a woman of post-operative follicular thyroid carcinoma (FTC) thyroid with tracer avid tumor thrombus in right brachiocephalic vein, treated with 131-iodine (131I) as a single modality for both remnant and tumor thrombus. Her subsequent follow-ups revealed excellent response to treatment.